Lexile Framework for Reading
http://www.lexile.com/



Edchange Multicultural Education
http://www.edchange.org/


The Textmapping Project
http://www.textmapping.org/

MiddleWeb
http://middleweb.com/

Text Readability Consensus Calculator
http://www.readabilityformulas.com/free-readability-formula-tests.php

Fry Readability Graph and other readability resources from Kathy Schrock
http://www.schrockguide.net/frys-readability-info.html